Tag: M.W=100-150

Kothe, Vinicius published the artcileThermodynamic analysis, experimental and kinetic modeling of levulinic acid esterification with ethanol at supercritical conditions, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is levulinic acid esterification ethanol thermodn kinetic model.

Et levulinate is an environmentally friendly biomass-derived ester that is an alternative to the classic petroleum-derived fuel additives. Several studies have been addressed to its chem. production pathways. The supercritical esterification of levulinic acid to Et levulinate, however, remains understudied. This work reports the effect of process variables and a kinetic study for the esterification of levulinic acid with ethanol under sub and supercritical conditions. Exptl. data were obtained in a continuous tubular reactor at a fixed pressure of 100 bar. The reaction temperature varied from 220 to 280 °C, and the ethanol to levulinic acid molar ratios from (2:1) to (9:1). Et levulinate was synthesized with high selectivity under all evaluated reaction conditions, achieving conversions up to 80% and 93% when ethanol to levulinic acid molar ratios of (2:1) and (9:1) were used, resp. A PFR model approach was considered with an elementary reversible self-catalyzed rate law, and the effect of considering the mixture d. behavior through the reactor using the PC-SAFT equation of state was discussed. The proposed kinetic approach was able to correlate the kinetic exptl. data for all exptl. conditions used in this study. Furthermore, a thermodn. anal. was performed to elucidate trends in reaction performance.

Fuel published new progress about Density. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Recommanded Product: Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Russo, Vincenzo published the artcileKinetic study of Amberlite IR120 catalyzed acid esterification of levulinic acid with ethanol: From batch to continuous operation, Category: esters-buliding-blocks, the main research area is levulinic acid ethanol esterification cation exchanger kinetics ethyl levulinate.

Levulinic acid (LA) is 1 of the most important platform chems. as it is a versatile building block for a variety of high value-added products, fine chems. and pharmaceutical intermediates. Catalytic esterification of LA with alkyl alcs. leads to levulinate esters which can be used as fragrances, flavoring agents and fuel additives. The kinetics of the levulinic acid esterification with EtOH in the presence of Amberlite IR120 was studied in a batch reactor. The collected exptl. data were interpreted with a reliable model taking into account also for the mass transfer phenomena involved in the reaction network. The kinetic model was further validated by conducting experiments in a fixed bed reactor. The reactor was characterized in terms of fluid-dynamics and the collected kinetic data were interpreted with a reliable reactor model, considering the extent of the reaction and fluid-solid mass transfer limitation.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Density. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ozeren, Husamettin D. published the artcileIn Silico Screening of Green Plasticizers for Poly(vinyl chloride), Computed Properties of 539-88-8, the main research area is polyvinyl chloride green plasticizer simulation property.

Phthalate derivative plasticizers used in poly(vinyl chloride) (PVC) processing have been a subject of concern because of their possible toxicity. Hence, there is a growing interest toward new, nontoxic, “”green”” plasticizers. In this work, the performances of biobased plasticizers including esters of succinic, levulinic, oleic, and adipic acids were compared in reference to the conventional plasticizer bis(2-ethylhexyl) phthalate (aka dioctyl phthalate or DOP). For this purpose, mol. dynamics (MD) simulations were used to determine polymer/plasticizer interactions and to predict thermomech. properties of polymer mixtures The variation of glass temperatures (Tg) of the systems was investigated, and the stabilities of the polymer/plasticizer mixtures were compared through the Flory-Huggins solubility parameter. The mech. properties were investigated through nonequilibrium MD simulations. Young’s modulus and yield strength values were predicted through stress-strain curves. The results suggest that succinic acid derivatives have the potential to replace phthalate derivatives due to their good solubility in PVC and their effectiveness in reducing the Tg.

Macromolecules (Washington, DC, United States) published new progress about Density. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Liu, Yixuan published the artcileCatalytic Stereoselective Conversion of Biomass-Derived 4′-Methoxypropiophenone to Trans-Anethole with a Bifunctional and Recyclable Hf-Based Polymeric Nanocatalyst, Application In Synthesis of 539-88-8, the main research area is methoxypropiophenone transanethole hafnium polymeric nanocatalyst catalytic stereoselective conversion; bifunctional catalysis; biomass conversion; dehydration; transfer hydrogenation; unconventional MOFs/polymeric materials.

Anethole (AN) is widely used as an odor cleaner in daily necessities, and can also be applied in the fields of food additives, drug synthesis, natural preservatives, and polymeric materials′ preparation Considering environmental and economic benefits, the use of biomass raw materials with non-precious metal catalysts to prepare high-value fine chems. is a very promising route. Here, we developed an acid-base bifunctional polymeric material (PhP-Hf (1:1.5)) composed of hafnium and phenylphosphonate in a molar ratio of 1:1.5 for catalytic conversion of biomass-derived 4′-methoxypropiophenone (4-MOPP) to AN via cascade Meerwein-Pondorf-Verley (MPV) reduction and dehydration reactions in a single pot. Compared with the traditional catalytic systems that use high-pressure hydrogen as a hydrogen donor, alc. can be used as a safer and more convenient hydrogen source and solvent. Among the tested alcs., 2-pentanol was found to be the best candidate in terms of pronounced selectivity. A high AN yield of 98.1% at 99.8% 4-MOPP conversion (TOF: 8.5 h-1) could be achieved over PhP-Hf (1:1.5) at 220 °C for 2 h. Further exploration of the reaction mechanism revealed that the acid and base sites of PhP-Hf (1:1.5) catalyst synergistically promote the MPV reduction step, while the Bronsted acid species significantly contribute to the subsequent dehydration step. In addition, the PhP-Hf polymeric nanocatalyst can be recycled at least five times, showing great potential in the catalytic conversion of biomass.

Polymers (Basel, Switzerland) published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application In Synthesis of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhao, Pingping published the artcileSynergistic Effect of Different Species in Stannic Chloride Solution on the Production of Levulinic Acid from Biomass, Application of Ethyl 4-oxopentanoate, the main research area is synergistic species stannic chloride solution levulinate biomass.

Metal chloride has shown high potential in biomass conversion to valuable chems., but the nature of active species and the corresponding performances on each successive reaction step need further elucidation. In this work, SnCl4 was found to exhibit satisfactory catalytic activity, achieving 64.6 mol % yield of levulinic acid from corncob residue. The levulinic acid obtained could be further converted to more valuable Et levulinate with 85% yield without any extra catalyst addition In water medium, the hydrolysis of SnCl4 resulted in the formation of stannic oxide, H+ and Cl-, which showed a synergistic effect and all contributed to levulinic acid production It was demystified that Cl- promoted cellulose hydrolysis, and the formed H+ as Bronsted acid mainly contributed to cellulose hydrolysis and fructose dehydration, as well as HMF decomposition to levulinic acid. Sn(IV) species facilitated both glucose-to-fructose isomerization and fructose consumption yielding undesirable polymers, but exhibited a neg. influence on cellulose hydrolysis. The proposed kinetic model showed a good fit with the exptl. result, and further confirmed the proposed catalytic mechanism. The insights reported here might give some useful information for the development of effective catalysts to produce valuable chems. directly from raw lignocelluloses.

ACS Sustainable Chemistry & Engineering published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application of Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Song, Jinliang published the artcileStrong Oxophilicity of Zr Species in Zr4+-Exchanged Montmorillonite Boosted Meerwein-Ponndorf-Verley Reduction of Renewable Carbonyl Compounds, Safety of Ethyl 4-oxopentanoate, the main research area is oxophilicity zirconium species exchanged montmorillonite Meerwein Ponndorf Verley reduction.

Meerwein-Ponndorf-Verley (MPV) reduction of biomass-derived carbonyl compounds is a greatly promising route for biomass valorization. Robust, facile-prepared, and cost-effective inorganic Zr-based catalysts for this transformation remain highly desirable. Herein, Zr-containing montmorillonite (denoted as Zr-MMT) was constructed by the ion exchange of Zr4+ with the interlayer cations of montmorillonite (MMT). Very interestingly, as an inorganic catalyst, the prepared Zr-MMT showed high catalytic activity for MPV reduction of various biomass-derived carbonyl compounds Systematic investigations revealed that the excellent performance of Zr-MMT predominantly originated from more pos. charged Zr species ([Zrx(OH)y(H2O)n](4x-y)+), which could boost the activation of the carbonyl group and simultaneously promote the hydrogen transfer process assisted by suitable basic sites on MMT. Notably, the preparation of Zr-MMT avoided the utilization of surfactants or expensive organic ligands, and the prepared Zr-MMT showed better or comparable catalytic performance than most reported Zr-containing catalysts, significantly enabling it to be more practical.

ACS Sustainable Chemistry & Engineering published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Safety of Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Hamdi, Jumanah published the artcileHalloysite-Catalyzed Esterification of Bio-Mass Derived Acids, Name: Ethyl 4-oxopentanoate, the main research area is halloysite catalyzed esterification bio acid.

Halloysite, a natural clay with a hollow tubular structure, was studied as a catalyst for the esterification of biomass-derived carboxylic acids (levulinic acid, fumaric acid, maleic acid, and succinic acid) with four different alcs. (MeOH, EtOH, n-PrOH, and n-BuOH). Reaction conditions were optimized (10 mol % halloysite, 170 °C, 24 h) and gave high yields of the corresponding esters and diesters (>90%). The halloysite was easily recovered and recycled after washing and drying.

ACS Omega published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Name: Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Tian, Yi published the artcileA New Sulfonic Acid-Functionalized Organic Polymer Catalyst for the Synthesis of Biomass-Derived Alkyl Levulinates, Application In Synthesis of 539-88-8, the main research area is sulfonate functionalized organic polymer catalyst biomass alkyl levulinate.

Alkyl levulinates are important biobased chems. with great fuel-blending properties and good reactivity. In this work, a new functionalized nitrogen-containing organic polymer bearing sulfonic acid groups (PDVTA-SO3H) was successfully prepared and studied for the esterification of levulinic acid with alcs. to produce alkyl levulinates. The results showed that this sulfonic acid-functionalized organic polymer possessed high catalytic activity, and the yield of Bu levulinate reached 97.4% under the mild conditions. PDVTA-SO3H exhibited strong acidic sites and high stability, and would be well expected to be a potential candidate better than some com. sulfonic solid catalysts for alkyl levulinates production The catalyst had been reused without any treatment for five times and the results proved its potential for industrial applications.

Catalysis Letters published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application In Synthesis of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Kondeboina, Murali published the artcileBimetallic Ni-Co/γ-Al2O3 catalyst for vapour phase production of γ-valerolactone: Deactivation studies and feedstock selection, HPLC of Formula: 539-88-8, the main research area is nickel cobalt alumina catalytic vapor phase reaction valerolactone.

With an aim to establish supported nonnoble Co metal catalysts for production of a promising fuel and fuel additive γ-valerolactone (GVL) at ambient pressure in continuous mode, Co/γ-Al2O3 and bimetallic Ni-Co/γ-Al2O3 catalysts were prepared and their catalytic activities vs. catalytic features were correlated. Ni-Co/γ-Al2O3 catalyst exhibited GVL productivity of 1.125 kgGVL.kg-1catalysth-1 which is relatively higher than Co/γ-Al2O3 catalyst. Ni-Co/γ-Al2O3 catalyst is stable during 12 h time-onstream studies while Co/γ-Al2O3 catalyst suffers from deactivation. The addition of Ni to Co/γ-Al2O3 augments the resultant bimetallic catalyst activity and coke resistance capacity. As evidenced from XRD, H2-TPR, XPS analyses the addition of Ni to Co/γ-Al2O3 gave Ni-Co alloy in the bimetallic catalysts. H2-pulse chemisorption studies and TEM analyses illustrate formation of smaller particles in bimetallic Ni-Co/γ-Al2O3 catalyst which in turn influenced the rate of formation of GVL. From TGA of spent catalysts, the C deposition rate is decreased in the case of Ni-Co/γ-Al2O3 catalyst (0.43 mmol.g-1cat.h-1) than Co/γ-Al2O3 catalyst (1.014 mmol.g-1cat.h-1). Among the feedstocks of GVL i.e. levulinic acid, Me levulinate, Et levulinate, Et levulinate is prominent in constantly yielding GVL during 24 h study over bimetallic Ni-Co/γ-Al2O3 catalyst.

Fuel published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, HPLC of Formula: 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Wang, Tianlong published the artcileMPV reduction of ethyl levulinate to γ-valerolactone by the biomass-derived chitosan-supported Zr catalyst, SDS of cas: 539-88-8, the main research area is reduction ethyl levulinate gamma valerolactone biomass chitosan zirconium catalyst.

Herein, we used the biopolymer chitosan as a support to synthesize a biomass-derived catalyst (chitosan-Zr) to achieve GVL in 97% yield from MPV reduction of EL, by using isopropanol as a hydrogen source. The catalyst system is also applicable to the reduction of various organic compounds with carbonyl groups. Addnl., we have proposed a possible mechanism for this reaction based on the systematic investigation towards the reaction. Moreover, the recycle and reuse experiment showed that this chitosan-Zr exhibited long-life catalytic performance and can maintain its high catalytic performance even after five runs of recycle and reuse experiments

New Journal of Chemistry published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, SDS of cas: 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics